Chaos Zealots were fell demagogues, preachers and priests of the Chaos Gods.
The Ruinous Powers have many gifts to offer their mortal followers and enemies alike. Some of them are quite terrible, but some of them powerful. Zealots are among the most devout of the followers of the gods of Chaos, and it is they who are called upon to convey the will of Chaos to their minions. It is Zealots who mark the followers of their patron deity, and who are charged with spreading their faith to the vulnerable and needy masses. They are not subtle cultists, but zealous preachers, and they offer open obedience to their dark masters.